我正在创建一个简单的客户端服务器应用程序，客户端将图像文件（.jpg）发送到服务器。但是，客户端无法连接到服务器。请告诉我哪里出错了。这就是我所做的。
客户端：
WSADATA wsaData;
SOCKET m_socket;
SOCKET m_backup;
sockaddr_in con;
SOCKET AcceptSocket;
WComm::WComm()
{
// Initialize Winsock.
int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != NO_ERROR)
printf("Error at WSAStartup()\n");
// Create a socket.
m_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_socket == INVALID_SOCKET) {
printf("Error at socket(): %ld\n", WSAGetLastError());
WSACleanup();
return;
}
m_backup = m_socket;
}
void WComm::connectServer(char *ip, int port)
{
// Connect to a server.
con.sin_family = AF_INET;
con.sin_addr.s_addr = inet_addr(ip);
con.sin_port = htons(port);
if (connect(m_socket, (SOCKADDR*)&con, sizeof(con)) == SOCKET_ERROR) {
printf("Failed to connect.\n");
WSACleanup();
return;
}
}
int WComm::sendData(char *sendbuf)
{
return send(m_socket, sendbuf, strlen(sendbuf), 0);
}
int WComm::recvData(char *recvbuf, int size)
{
int sz = recv(m_socket, recvbuf, size, 0);
recvbuf[sz] = '\0';
return sz;
}
void WComm::closeConnection()
{
closesocket(m_socket);
m_socket = m_backup;
}
void WComm::fileSend(char *fpath)
{
// Extract only filename from given path.
char filename[50];
int i = strlen(fpath);
for (; i>0; i--)if (fpath[i - 1] == '\\')break;
for (int j = 0; i <= (int)strlen(fpath); i++)filename[j++] = fpath[i];
////////////////////////////////////////
ifstream myFile(fpath, ios::in | ios::binary | ios::ate);
int size = (int)myFile.tellg();
myFile.close();
char filesize[10]; itoa(size, filesize, 10);
send(m_socket, filename, strlen(filename), 0);
char rec[32] = ""; recv(m_socket, rec, 32, 0);
send(m_socket, filesize, strlen(filesize), 0);
recv(m_socket, rec, 32, 0);
FILE *fr = fopen("C:\\Images\\abc.jpg", "rb");
while (size > 0)
{
char buffer[1030];
if (size >= 1024)
{
fread(buffer, 1024, 1, fr);
send(m_socket, buffer, 1024, 0);
recv(m_socket, rec, 32, 0);
}
else
{
fread(buffer, size, 1, fr);
buffer[size] = '\0';
send(m_socket, buffer, size, 0);
recv(m_socket, rec, 32, 0);
}
size -= 1024;
}
fclose(fr);
}
WComm w;
void main(int argc, char *argv[])
{
runclient(argv[1], argv[2]);
}
void runclient(char *ip, char *fpath)
{
char rec[32] = "";
// Connect To Server
w.connectServer(ip, 27015);
printf("Connected to server...\n");
// Sending File
w.sendData("FileSend");
w.recvData(rec, 32);
w.fileSend(fpath);
printf("File Sent.............\n");
// Send Close Connection Signal
w.sendData("EndConnection"); w.recvData(rec, 32);
printf("Connection ended......\n");
}
服务器：
#include "wcomm.h"
WSADATA wsaData;
SOCKET m_socket;
SOCKET m_backup;
sockaddr_in con;
SOCKET AcceptSocket;
WComm::WComm()
{
// Initialize Winsock.
int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
if ( iResult != NO_ERROR )
printf("Error at WSAStartup()\n");
// Create a socket.
m_socket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
if ( m_socket == INVALID_SOCKET ) {
printf( "Error at socket(): %ld\n", WSAGetLastError() );
WSACleanup();
return;
}
m_backup = m_socket;
}
void WComm::startServer(int port)
{
// Connect to a server.
con.sin_family = AF_INET;
con.sin_addr.s_addr = inet_addr( "0.0.0.0" );
con.sin_port = htons( port );
if ( bind( m_socket, (SOCKADDR*) &con, sizeof(con) ) == SOCKET_ERROR) {
printf( "Failed to connect.\n" );
WSACleanup();
return;
}
// Listen on the socket.
if ( listen( m_socket, 1 ) == SOCKET_ERROR )
printf( "Error listening on socket.\n");
}
void WComm::waitForClient()
{
AcceptSocket = SOCKET_ERROR;
while ( AcceptSocket == SOCKET_ERROR ) {
AcceptSocket = accept( m_backup, NULL, NULL );
}
m_socket = AcceptSocket;
}
int WComm::sendData(char *sendbuf)
{
return send( m_socket, sendbuf, strlen(sendbuf), 0 );
}
int WComm::recvData(char *recvbuf,int size)
{
int sz = recv( m_socket, recvbuf, size, 0 );
recvbuf[sz] = '\0';
return sz;
}
void WComm::closeConnection()
{
closesocket(m_socket);
m_socket = m_backup;
}
void WComm::fileReceive(char *filename)
{
char rec[50] = "";
recv( m_socket, filename, 32, 0 );
send( m_socket, "OK", strlen("OK"), 0 );
FILE *fw = fopen(filename, "wb");
int recs = recv( m_socket, rec, 32, 0 );
send( m_socket, "OK", strlen("OK"), 0 );
rec[recs]='\0';
int size = atoi(rec);
while(size > 0)
{
char buffer[1030];
if(size>=1024)
{
recv( m_socket, buffer, 1024, 0 );
send( m_socket, "OK", strlen("OK"), 0 );
fwrite(buffer, 1024, 1, fw);
}
else
{
recv( m_socket, buffer, size, 0 );
send( m_socket, "OK", strlen("OK"), 0 );
buffer[size]='\0';
fwrite(buffer, size, 1, fw);
}
size -= 1024;
}
fclose(fw);
}
WComm w;
void main(int argc, char *argv[])
{
runserver();
}
void runserver()
{
// Start Server Daemon
w.startServer(27015);
printf("Server Started........\n");
while (TRUE) {
// Wait until a client connects
w.waitForClient();
printf("Client Connected......\n");
// Work with client
while (TRUE)
{
char rec[50] = "";
w.recvData(rec, 32);
w.sendData("OK");
if (strcmp(rec, "FileSend") == 0)
{
char fname[32] = "";
w.fileReceive(fname);
printf("File Received.........\n");
}
if (strcmp(rec, "EndConnection") == 0)break;
printf("Connection Ended......\n");
}
// Disconnect client
w.closeConnection();
}
}
另外，如果我想发送1张以上的图像，那我应该怎么做呢？是否可以使用Generic List来保存我想要发送的所有图像？怎么去？请帮忙